int pull_find_old_etags(const char *url, const char *root, int dt, const char *prefix, const char *suffix, char ***etags);
-int pull_make_read_only_fd(int fd);
-int pull_make_read_only(const char *path);
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int pull_make_path(const char *url, const char *etag, const char *image_root, const char *prefix, const char *suffix, char **ret);
int pull_make_verification_jobs(PullJob **ret_checksum_job, PullJob **ret_signature_job, ImportVerify verify, const char *url, CurlGlue *glue, PullJobFinished on_finished, void *userdata);
int pull_verify(PullJob *main_job, PullJob *checksum_job, PullJob *signature_job);
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-int pull_fork_tar(const char *path, pid_t *ret);